asterix-graphix/src/main/java/org/apache/asterix/graphix/lang/rewrite/visitor/PreRewriteCheckVisitor.java [118:134]:
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                case SOURCE_VERTEX_NOT_FOUND:
                    throw new CompilationException(ErrorCode.COMPILATION_ERROR, edge.getSourceLocation(),
                            "Source vertex " + edge.getSourceLabel() + " not found in the edge " + edge.getEdgeLabel()
                                    + ".");

                case DESTINATION_VERTEX_NOT_FOUND:
                    throw new CompilationException(ErrorCode.COMPILATION_ERROR, edge.getSourceLocation(),
                            "Destination vertex " + edge.getDestinationLabel() + " not found in the edge "
                                    + edge.getEdgeLabel() + ".");

                case EDGE_LABEL_CONFLICT:
                    throw new CompilationException(ErrorCode.COMPILATION_ERROR, edge.getSourceLocation(),
                            "Conflicting edge label found: " + edge.getEdgeLabel());

                default:
                    throw new CompilationException(ErrorCode.COMPILATION_ILLEGAL_STATE, edge.getSourceLocation(),
                            "Edge constructor was not returned, and an unexpected error encountered");
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asterix-graphix/src/main/java/org/apache/asterix/graphix/lang/util/GraphStatementHandlingUtil.java [170:186]:
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                case SOURCE_VERTEX_NOT_FOUND:
                    throw new CompilationException(ErrorCode.COMPILATION_ERROR, edge.getSourceLocation(),
                            "Source vertex " + edge.getSourceLabel() + " not found in the edge " + edge.getEdgeLabel()
                                    + ".");

                case DESTINATION_VERTEX_NOT_FOUND:
                    throw new CompilationException(ErrorCode.COMPILATION_ERROR, edge.getSourceLocation(),
                            "Destination vertex " + edge.getDestinationLabel() + " not found in the edge "
                                    + edge.getEdgeLabel() + ".");

                case EDGE_LABEL_CONFLICT:
                    throw new CompilationException(ErrorCode.COMPILATION_ERROR, edge.getSourceLocation(),
                            "Conflicting edge label found: " + edge.getEdgeLabel());

                default:
                    throw new CompilationException(ErrorCode.COMPILATION_ILLEGAL_STATE, edge.getSourceLocation(),
                            "Edge constructor was not returned, and an unexpected error encountered");
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